本文選題：DSP + 疲勞�。� 參考：《大連理工大學》2014年碩士論文

【摘要】：近年來,經(jīng)濟的迅速發(fā)展,使得公路和橋梁越來越多,而公路和橋梁的非正常使用,如施工不當、車輛超重等等,也導致了一系列的問題。通常情況下,超重車輛對公路和橋梁結構的損傷比正常載重的車輛大得多,導致路橋結構的過早疲勞。為了對損傷進行實時預警并評估路橋結構的安全性,許多公路和橋梁都安裝了結構健康監(jiān)測系統(tǒng)。然而,由于當前的結構健康監(jiān)測系統(tǒng)的構建復雜,且系統(tǒng)造價高、安裝不便利,使系統(tǒng)不適用于一般公路和橋梁的使用。基于此,本文設計了一種基于DSP (Digital Signal Processor)的小型化、安裝方便并且成本低廉的超重監(jiān)測與響應系統(tǒng)。 本系統(tǒng)主要利用路橋表面鋪設的傳感器陣列所感應的動態(tài)實時信號,來對當前的結構損傷加以分析,進而評估道路和橋梁的承載能力和剩余疲勞壽命。系統(tǒng)主要由傳感器陣列、電荷放大模塊、DSP處理器、超重報警系統(tǒng)以及路橋結構損傷評估五部分組成。傳感器陣列系統(tǒng)采用了地感線圈和交通傳感器相配合的布設方式,保證了系統(tǒng)可以在車流量較大時依然能準確識別車牌信息、監(jiān)測車輛載重；傳感器陣列產(chǎn)生的信號經(jīng)過電荷放大器放大后送給DSP處理器,帶有內置AD模塊的DSP把模擬信號轉化成數(shù)字信號并結合超重閾值判斷是否超重；若車輛超重,系統(tǒng)將對其進行響應處理,包括通過圖像采集進行車牌識別、對違規(guī)超重車輛報警,同時數(shù)據(jù)中心采用嵌入式雨流計數(shù)法對超重數(shù)據(jù)進行處理,進而實現(xiàn)對路橋結構的疲勞分析和安全評估。 現(xiàn)場測試結果表明：在中速行駛中,車輛壓力監(jiān)測的誤差率在3.8%到8.7%之間,系統(tǒng)能夠準確地實時監(jiān)測路橋上車輛的過載情況,通過報警抓拍模塊實現(xiàn)了對超重車輛的車牌號碼、車牌顏色和通過時間等信息的預警與記錄,并且基于超重數(shù)據(jù)進行穩(wěn)定的智能疲勞監(jiān)測。該系統(tǒng)具有小型化、嵌入式結構、實時響應等特點,非常適合常規(guī)路橋超載車輛的監(jiān)測與控制,具有很好的應用前景。
[Abstract]:In recent years, with the rapid development of economy, more and more highways and bridges have been used, and the abnormal use of highways and bridges, such as improper construction, overweight vehicles and so on, has also led to a series of problems. Generally, the damage of overweight vehicles to highway and bridge structures is much greater than that of normal load vehicles, which leads to premature fatigue of road and bridge structures. In order to warn the damage in real time and evaluate the safety of highway and bridge, many highway and bridge are equipped with structural health monitoring system. However, the current structural health monitoring system is not suitable for the general highway and bridge because of its complex construction, high cost and convenient installation. Based on this, a miniaturization, easy installation and low cost overweight monitoring and response system based on DSP Digital Signal Processor is designed in this paper. In this system, the dynamic real-time signals induced by sensor array laid on the surface of the road and bridge are used to analyze the current structural damage, and then to evaluate the bearing capacity and residual fatigue life of the road and bridge. The system consists of sensor array, charge amplifier module and DSP processor, overweight alarm system and damage assessment of road and bridge structure. The sensor array system adopts the collocation mode of ground sensing coil and traffic sensor, which ensures that the system can recognize the license plate information accurately and monitor the vehicle load when the traffic flow is large. The signal generated by the sensor array is amplified by a charge amplifier and sent to the DSP processor. The DSP with a built-in AD module converts the analog signal into a digital signal and determines whether it is overweight or not combined with the overweight threshold; if the vehicle is overweight, The system will deal with its response, including license plate recognition through image collection, warning of illegal overweight vehicles, and the use of embedded rain flow counting method to process the overweight data in the data center. Then the fatigue analysis and safety evaluation of the bridge structure are realized. The field test results show that the error rate of vehicle pressure monitoring is between 3.8% and 8.7%. The system can accurately and real-time monitor the overload of vehicles on the road and bridge, and realize the license plate number of the overweight vehicle by alarm capture module. Warning and recording of license plate color and passing time, and intelligent fatigue monitoring based on overweight data. The system has the characteristics of miniaturization, embedded structure, real-time response and so on. It is very suitable for the monitoring and control of conventional overloaded road and bridge vehicles, and has a good application prospect.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U418;U446;TP274

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本文編號：1853711